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1.
A device used by females (similar to conventional "tampons") to seriously injure the penis of a possible sexual assailant.

i'm wearing my rapex, no man will rape me and get away with it...

you should've wore your rapex...he would've regretted it!!!
by jim penthouse November 02, 2005
 
2.
Rapex means to rage for no apparent reason or to get angered easily with little to no effort needed.
Kid 1: I f***** your mom!
Average Rapexir: No you didn't, you little homo!!!
Kid 2: Woah, it's a joke. Don't rapex.
by Eddie&Quezo March 30, 2014